Flue cutter and roller.



N'o. 672,448.l Patented Apr. 23, |90I.

J. MACKENZIE. FLUE CUTTER AND ROLLER. (Application mea spe. 1o, 189s.)(No Model.)

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JOHN MACKENZIE, OF CLEVELAND, OHIO.

FLUE CUTTER AND ROLLER.

SPECIFICATION forming part of Letters Patent No. 672,448, dated April23, 1901.

Application filed September 10, 1898. Serial No. 690,668. (No model .To@Z5 whom t may concern:

Beit known that I, JOHN MAOKENZIE, a citizen of the United States ofAmerica, residing at Cleveland, in the county of Cuyahoga, in the Stateof Ohio, have invented certain new and useful Improvements in FlueCutters and Rollers, of which the following is a description, referencebeing had to the accompanying drawings, forming part of thisspecification.

My invention relates to that class of rotary flue-cutters which areadapted to be inserted in the end of the boiler-flue and operated to cutoif the tip of the flue inside the boiler; but it is also applicable toother work, and the cutting instrument may be replaced by a roller andthe tool thereby adapted for rolling or expanding flues. It has for itsobject the provision of simple and effective means by which flue-tipsmay be conveniently and expeditiously cut off'or rolled, as occasion mayrequire. Its novelty will be hereinafter set forth, and particularlypointed out in the claims.

In the accompanying drawings, Figure l is a top plan view of thecomplete implement; Fig. 2, a vertical longitudinal section of the samewith the cutter retracted; Fig. 3, a View corresponding to Fig. 2 withthe cutter forced outward; Fig. 1l, a cross-section on the line 4: 4 ofFig. l; Fig. 5, an enlarged cross-section on the line 5 5 of Fig. 2, andFig. 6 a detail View" illustrating the substitution of the roller forthe cutter to adapt the implement to the work of rolling fines.

The saine letters of reference are used to indicate corresponding partsin the several views.

A represents the cylindrical tool-stock, whose reduced left-hand endterminates in a shank B of rectangular or other suitable shape to fitinto the socket or chuck of a suitable power-driven device by which thetool is to be driven. The middle portion of the tool-stock A isexteriorly threaded and is provided with a longitudinal slot O, whichextends transversely entirely through it and at its right-hand endcommunicates with an approximately central bore or opening D, extendingonward to the right entirely through the end of the tool. The right-handend of the tool-stock has asinooth exterior surface, between which andits threaded middle portion is formed a projecting annular flange E.Seated in a recess formed in the front end of the tool-stock` is aradially-movable cutterblock F, in which is mounted a cutting-disk G.When the block F is inits inner or withdrawn position, as in Figs. 2 and5, the periphery of the cutting-disk G is approximately ush with thecylindrical exterior of the toolstock or slightly withdrawn inwardtherefrom, while when the cutter-block is moved radially outward theperiphery of the cutting-disk G is projected beyond the exterior surfaceof the tool-stock, as in Fig. 3.

For the purpose of forcing the cutter outward from the position shown inFig. 2 to that shown in Fig. 3, there is provided a tapering spindle H,extending longitudinally through the tool-stock from the left-hand endof the slot C through the latter and into the bore D in the right-handend of the tool, where the tapering end of the spindle engages the underside of the cutter-block F, as shown in Figs. 2, 3, and 5. As shown inthe latter figure, the spindle H bears on its side opposite thecutter-block F (its under side in Fig. 5) upon two antifriction-rollersI I, which are suitably journaled in thetool-stockin such position thattheir peripheries project slightly beyond its exterior surface, so thatwhenthe end of the tool is inserted into the iiue these rollers willbear against the inner surface of the flue at one side, while the cutterG bears against it at the opposite side, thus relieving the frictionvwhich would otherwise occur if.

head J, which is free to travel longitudinallyv through the slotOtherein and whose opposite ends are confined in an internal annular IOOgroove K in a nut L, surrounding and engaging the threaded exterior otthe middle portion of the tool-stock. This nut L is formed in two.halves, which are hinged together at one side by a link a andpivot-screws b b, as shown in Fig. 4, (or in any other suitable mannen)land at their opposite sides are provided with projecting handles M M,adapted to be together grasped in the hand of the operator. When the twohalves of the nut L are closed upon the threaded body of the tool-stock,as shown in the drawings, and the tool is rotated by the power-drivendevice, while the nut is held from rotation by the hand ofthe operatorgrasping the handles M M thereof, the nut will be moved along the bodyof the tool toward the right by the rotation of the tool, carrying withit in that direction the tapering spindle H, and thereby forcing outwardthe cutter-block F and cutter G. When the cutter is to be retractedpreparatory to withdrawing the tool from the Hue and operating upon thenext iue, the nut L may be readily disengaged from the threaded body ofthe tool by slightly separating the handles M M, whereupon the nut maybe quickly returned to its left-hand initial position, Figs. l and 2,thereby bringing the parts into position for the next operation.

An adjustable screw N is interposed between the handles M M for properlylimiting the closing movement of the halves of the nut and preventingthem too tightly engaging with the threaded body of the tool. A loop orclip Ois also provided, to be slipped over the ends of the handles M Mwhen the two halves of the nut are in closed position, as a convenientmeans for holding them engaged with the threaded body of the tool; butthis may be done in other ways or solely by the hand of the operator.

From the foregoing description it will be understood that in using mynovel tool its righthand end will be inserted in the end of the fluewhose tip is to be severed until the projecting flange E abuts againstthe end of the flue and will be held in that position while beingrapidly rotated by the power-driven device, the operator holding thehandles M M of the nut in his hand so that the nut will be vmoved to theright along the tool as the latter rotates and the spindle H therebycaused to force the cutter outward into engagement 'with the innersurface of the lue, the cutter acting upon the latter along a singleline circumferentiallyof the flue. When the cutter has been forcedoutward far enough to sever the tip of the tiue, 'the rotation of thetool will be stopped and the two halves of the nut spread apart anddisengaged from the body of the tool and the nut and spindle I-I movedbackward along the tool to the left-hand position and the nut rengagedtherewith, whereupon the end ot' the tool will be withdrawn from theflue which it had been operating upon and inserted into the end of thenext iiueand the same operation repeated.

As stated at the beginning of the specification, my novel tool may beemployed either as a flue-cutter or a tine-roller, its employ- -where itis intended that the same tool shall be provided for the substitution ofthe roller for the cutter, and vice versa, the cutterblock of Figs. 2and 3 will be made as long as the block in Fig. 6, so that they will fitthe same recess in the tool, as will be readily understood.

The cutter-block or roller-block F may either be made of two halvessecured together by screws c c, as in Figs. 2, 3, and 5, in which casethe cutting disk or roller may be provided with integral projectingtrunnions orjournals, or the block may be made of a single solid piece,as in Fig. 6, in which event the cutting disk or roller will be providedwith a central bore and mounted upon a separate spindle passed throughit and supported in a block. In each case there is shown a pin d passedlongitudinally through the lower end of the block and projecting beyondits ends for the purpose of preventing the block slipping entirely outof its seat in the tool.

I-Iaving thus fully described my invention, I claiml. A tool of thecharacter described, comprising a rotary tool-stock adapted to abut andturn against the end of the ilue, a radiallymovable block mountedtherein and carrying the working tool, a tapered spindle movablelongitudinally of the tool-stock for forcing said block outward,and atwo-part nut threaded upon the tool-stock and connected with saidspindle, said nut being advanced upon the tool-stock by the rotation ofthe latter in one direction and serving thereby to advance the taperedspindle and force outward the working tool, and being also adapted tohave its two halves separated and disengaged from the tool-stock topermit the nut to be moved toward the rear end ofthe tool-stock andretract the tapered spindle, for the purpose described.

2; The herein-described tool,comprising the body Ahaving theeXteriorly-threaded middle portion and provided with the slot Gandflange E, the radially-movable block F seated in a recess in said bodyand carrying the working tool, the tapering spindle H ooperating withthe block F, the two-part nut L engaging the threaded body A and havingits two halves hinged together at one side and provided at theiropposite sides with the projecting handles M M, the adjustablestop-screw N interposed between the handles M M, and the cross-head Jextending transversely through the slot C in the body A and engaging thein- IOO IIO

ternal groove K in the nut L, and connected l rollers I I, the two-partnut L engaging the with the tapering spindle H, for the purpose Ithreaded portion of the bodyA and provided described. With the internalgroove K, and the cross- 3. The herein-describedto01,comprising the head.I extending through the slot (l in the bodyA having theeXteriorly-threaded middle body A and engaging the groove K, andconportion and providedwith the slotOand flange nected with the taperingspindle H, for the E, the radially-movable block F seated in a purposedescribed. recess in said body and carrying the Working tool, theantifriction-rollers I I `journaled in JOHN MACKENZIE the body Aopposite the block F, the longitudinally-movable tapering spindle Hhaving its end projecting between the block F and Witnesses: A

J oHN H. NICHOLS, GEO. W. GLIcK.

